Ncu Replacement - Siemens SINUMERIK 840D sl Function Manual

Several Operator Panels on Several NCUs, Distributed Systems (B3)
Several operator panel fronts and NCUs, standard functionality
2.3.5

NCU replacement

The procedure for NCU replacement or configuration of an additional NCU is similar to that
for commissioning (see "Power up").
Variant 1
1. Establish 1:1 connection between PCU and NCU
2. Power up HMI on NCU with bus address "13" (see above)
3. Enter new NC address via the Commissioning/NC/NC address operating area and boot
4. Rewire bus for M:N operation
Variant 2
1. The NCU which is the "power-up NCU" for a PCU connected to the bus is disabled. (The
2. Power up HMI on NCU with bus address 13 (see above)
3. Enter new NC address via the Commissioning/NC/NC address operating area and boot
4. Reactivate "Power-up NCU" again
Data exchange between NC<->PLC
In configurations consisting of 1 x PCU and n x NCUs, it is often necessary to synchronize
the NCUs.
The following synchronization options are available:
● NCK I/Os on drive bus (digital, analog, writing of NC and PLC).
● PLC I/Os (I/O link).
● Link via PROFIBUS DP.
● Link via Global Data function of SIMATIC S7.
136
NCU.
HMI powers up at the first connection configured in the NETNAMES.INI file)
NCU.
Note
Please note:
• Bus address 13 must be reserved for servicing purposes (and should not be assigned
to a bus node).
• HMI Embedded:
The length of the names in the file NETNAMES.INI (configuration of channel menu) is
limited to five characters.
• HMI Advanced:
The "mstt_address" data item is not evaluated, it is used for documenting the bus
nodes. If the channels are located on different NCUs, "m:n" must be entered in the
Commissioning/HMI/Operator panel operating area.
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions